Can u tell what year an engine is by the numbers on it???

[jamestown55]

Can anyone tell me if they know what year this engine is???? I am interested in purchasing a used bottom end. The guy selling it says it's from a 92-95 Honda Cr 250 but it looks a little different then mine.....I don't want to buy something that is not compatible..
Here are the numbers on the engine....
ME03E
2807970


Thanks